Mixing machine



July 15 1924. 1.501578 L. M. ZEPP MIXING momma Filed March 10. 1923 a Sheets-Sheet 1 Jrwenfoz July 15, 1924. 1.501578 L. M. ZEPP HIKING MACHINE Filed larch 10. 1923 8 Sheets-Sheet 2 L. M. ZEPP MIXING- MACHINE July 15 1924. I 1,501,578

Filed larch 1O 1923 8 Sheets-Sheet 3 M. ZEPP nuxms 2440mm:

Filed March 10 1923 8 sheets-Sheet 5 I I l II L. M. ZEPP L578 "nuns MACHINE Filed March 10. 1923 8 Sheets-Sheet 6 July 15 1924. 7 1.501578 L. M. ZEPP MIXING MACHINE Filed March 10. 1923 8 Sheets-Sheet 7 July 15. 1924. 1,501,578

| M. ZEPP MIXING llACHINE Filed llaroh 10. 1923 8 Sheets-Sheet 8 Patented July 15, 1924.

UNITED STATES LEVIGNE M. ZEPP, OF BALTIMORE, MARYLAND.

MIXING MACHINE.

Application filed March 10, 1923. Serial No. 624,087.

To (122 whom it may concern:

Be it known that I, LEVIGNE M. ZEPP, a citizen of the United States of America, re siding in the city of Baltimore, State of Maryland, have invented certain new and useful Improvements in Mixing Machines, of which the following is a specification.

lVhile the invention has to do rimarily with a mixing machine, the embodiment illustrated being particularly adapted for hydrating lime, the invention is capable of more general application and various features and combinations included in the structure disclosed and claimed, are capable of being utilized separately and in various relations other than that in which they are illustrated in this application.

The machine as shown comprises a plurality of cooperating mechanisms coordinating to produce a single result and preferably actuated from a single source of power.

The entire operation of the machine is automatic and in fact the absence of any necessity for supervision so long as a continuous supply of the materials to be mixed is maintained, is an important feature of the invention feeding, measuring, mixing for a predetermined period and dumping being entirely automatic. Another feature of the invention resides in the provision of means whereby the operation ol' the machine may be changed at: will as to the time of completing a single cycle, i. e., as to the mixing period, and as to the relation of the different operations.

More particularly the machine which is intended to operate in connection with any suitable means, human or mechanical, for maintaining a continuous supply of the material or materials used, which in the instance illustrated are comminuted unslaclted limeand water, comprises means for controlling the supply of materials and a weighing device, feeding means, a mixer and discharging mechanism. 7 V

The mixer as shown maybe a rotary mixer with stationary plows, the rotary member being driven at any preferred speed from any suitable sourceof power and the machine comprises in addition to the parts already recited a timing mechanism operated at a speed corresponding to that of the mixer whereby the feeding and discharging operations are timed and tripped.

As shown the inlet valve or gates are opened by the timing mechanism and tripped or closed by the weighing mechanism. In other words, when the hopper is full and ready to dump, the feed of material to the hopper is discontinued. The weighing device or hopper in turn discharges into the mixer whenever its contents has accumulated to the extent of the desired charge. The discharge from the mixer is automatic and is controlled by the timing mechanism as aforesaid, which is driven at a speed proportionate to that of the mixer.

The timing mechanism is in turn adjustable to give various periods of mixing which aside from this adjustment or regulation of the mixing period, the entire operation of feeding, weighing, mixing and discharging is automatic and is repeated indefinitely without the necessity for attendance or outside control.

In the accompanying drawings I have illustrated a machine embodying my invention in the preferred form. In the drawin igure 1 is a side elevation showing the entire machine, a portion of the mixer drum being broken away for convenience of illustration;

Figure 2 is an elevation taken from the right in Figure 1 showing the top portion only of the machine, including the feed gates and the weighing mechanism or 110 per;

Fi ure 3 is a section parallel to t e plane of Figure 2 showing the hopper only;

Figure 4 is a plan showing the gearing beneath the mixer;

Figure 5 is an elevation of the same taken from the right in Figure 1;

Figure 6 is a view showing the timer shaft in elevation, the gears thereon being shown in section;

Figure 7 is a fragmentary elevation showin the mixer drum, guide and bearin s;

igure 8 is an elevation showing the rive pulley, reducing gear and beveled gear meshing with the mixer drum ring gear;

Figure 9 is a top plan of the mixer drum and plow frame, etc.;

Figure 10 is an elevation of the mixer discharge valve;

Figure 11 is an elevation of the timing mechanism which is diagrammatic in the sense that some of the parts are slightly distorted to bring them into the plane of the spg i e ts heme 4 Figure 12 a." dgtgil of the supporting and releasing mechanism;

Figure 13 is a detail illustrating the hopper locking mechanism.

Referring to the drawings by numerals, each of which is used to indicate the same or corresponding parts in the different figures; the machine as shown comprises a frame 1, a miner drum 2 mounted thereon to rotate abo t a r i x a sta i na y cover 3 therefor, mixer plows 5 supported n the u we ghing hoops" 6, f ed gate 7 d timhi mechanism Mo e pa ular he mixing d m may be driven from suitable source Qf power by means of a pulley 10 on the shaft with a tootbflfl gear 11 which meshes with a secnd largett ethed gea 2. n the haftw h a beveled pinion 14; which meshes. with a correspondingly beveled ring gear 16 seured to the hct ombf; the w s r r m 2 nd se heh ih w hg b arings her of so a h speed o he auxin hum 1s a 911' stant unction of the spec of the dr vlng Pu ley 1o. i

The timing mechanism 8 1 d wn by a pawl an tchet g a whi h is actu t d y and with a step by step motion communia d n i fro he mixe lhis stsp y step motion in the form of the invention shown is produced by means of a cam member 17, secured to the bottom of the miger down ee gu 4; a d and ha ing a pa h 18 which at each revolution of the drum enage a w eta llo 1 m nt d on the pawl mechanism. This pawl mechanism compr s a id ng sha t 20 mounted in a ide hea ing 21 n the hm hi'ne f ame Th s slide shaft 20 is normally thrust to the right in gure y oil spring 22; and t e shaf and w are posi ioned, by m a s of a pi or 03111 sui able t p 2 which I ages t d surface o he hea i g 21 wh h g ves 11 normal position of the follower in line with he Pa h 18 of t am- The sl ding haf 20 carries at its left hand end a yoke or bracket 26 which supports a horizontal tud shaft 27 between two arms 28 of said bracket, and the pawl 30 is pivoted on said stud engagin ratchet wi 31 of ratchet gear 32 secured to a shortnpright shaft 33 mounted to ro w ihi u rhh a ihs s 'hwse. The atch t t eth .31 are in. several, mon hs sets of different diameter, see Figure; 4, th

this connection'lit should be holed that pawl 30 is mounted to slide along the stud 27 and by rocking or tippin about the shaft the tail 35 of the pawl whic as shown engages the central one of a series of notches 34 in the bracket 2d opposite and arranged in a line parallel to the stud 2?, the pawl may be disengaged from said notch and moved from one to the other and engaged with any of them which gives an adjustment of the pawl, permitting it to mesh with any one of the sets of ratchet teeth 31-31' 8131'. This adjustment of the pawl provides for variation of the length of the mixing operation as hereinafter described. It is obvious that in each rotation of the tub or mixing drum the cam 18 will engage the follower 19 imparting a reciprocating mo tion to the sliding shaft 20 and hence to the pawl causing it to rotate the ratchet gear 32 throu h a short are, i. e., a single step.

It as already been pointed out that the ratchet gear 32 is rigidly secured to the shaft 33. A small toothed gear 37 is also secured to this shaft and therefore rotates with it and the ratchet. This gear 3? meshes with a larger toothed gear 38 known as the feeding and dumping dog gear which as shown is loosely mounted "on the cam af 39 so at his gear rota es indep ndently of the cam shaft at a speed communicated to it from the timer shaft 33 which is a step by ste motion corresponding to the rotation of tie drum. This gear which we will refer to as the feeding and dumping pawl gear carries two pins or dogs, 4t) knownhs the inlet dog, and 41 known'as the dumping dog. These pins or dogs 40 and i1 respectively engage arms -12 and 43 on the inlet tripping shaft 4i and dumper tripping shaft 451 The feeding and dumping dog gear 88 rotates once during each operation, i. e., during the treatment of one load.

The timing mechanism including the dogs 40 and 41 may be set when the machine is started. This setting is accomplished by means of a rotary hand lever 46 pivoted on the timer shaft and carrying a pawl 47 adapted to engage with the ratchet gear 32 to provide for rotating that gear manually to an desired position which moves the dogs 0 and 41 correspondingly.

In connection with the tripping shafts 44 and 45, the inlet and dumping mechanisms are controlled by certain cams which are rotated by the cam shaft 39. This cam shaft is driven from the rotary mixing drum by bevel gear 48 which meshes with the ring gear 16 on the drum. The bevel gear 48 is secured to a shaft 49, mounted in suitable bearings 50 on the frame which are spaced apart to admit a worm gear 51 which is secured to the cam shaft.

Referrin now to Figure 4 and Figure 1,

the inlet tripping shaft 44 which, it will be understood, is oscillated through a slight are by contact of the dog 40 with the arm 42 being returned to normal position by spring 53, engaging arm 54, see Figure 1. This shaft which extends upward parallel to the cam shaft 39, carries a cam follower arm 56, with a follower 5T thereon the arm being rigidly connected, to, the shaft 44. The oscillation of the tripping shaft 44 as described throws this follower 57 out of engagement with the high point 64 of said cam.

path 58 of cam 59 which it normally engages. The parts 59 and 62 compose a jaw clutch controlled by shaft 44 through follower 57 in turn controlling cam 200. Normally the follower 57 holds this cam 59 which is provided at its upper surface with clutch teeth 60 in the low position the follower 57 being normally in contact with the This member 59 is free to rotate and slide up and down relatively to shaft 39. The clutch teeth 60 are shaped and arranged to co-operate with clutch teeth 61 011 collar 62, on shaft 39 which is keyed to the shaft and which therefore rotates constantly. Also shaft 39 carries cam member 200 mounted thereon to rotate freely relatively thereto and connected to cam 59 by pins 201. These pins are secured to the cam member 59, parallel to the shaft and engage holes 204 in the cam memher 200 causing members 59 and 200 to rotate together. Cam 200 is supported on the collar 62 while 59 slides up and down and both rotate with the collar when the teeth the cam clutch member 59 permitting it to move upward in response to the pressure of coil spring 63 which encircles the shaft beneath the member 59 and this upward motion causes the teeth 60 and 61 to mesh rotating the members 59 and cam 200 through one turn, the tripper shaft 44 being immediately released by the escape of the dog 40 from the arm 42, swings backward in response to the action of thespring 53, causing the follower 57 to again engage the path 58 and rotation of the parts brings this follower into engagement with the high part 6 1 of the path 58, depressing the cam clutch member 59, releasing the clutch teeth and cam 200 which immediately stops.

During the rotation of the cam 62, however, it engages and actuates a follower 65 which is mounted on the end of an intermediately pivoted lever 66, see Figure 11, the swinging end 67 of which is pivotally connected to the lower end of the connecting rod 68 which extends upward to the top of the machine where it is connected to the gate mechanism. see Figure 2. The connecting rod 68 is pivotally connected to one end of a lever 69 which is intermediately pivoted at 70 on the frame of the machine and weighed at 71 as to its other end. This lever 69 is provided intermediately with a depending arm 72 in the nature of a bell crank to which is pivoted at the lower end of said bell crank arm a connecting rod 73 which is pivotally connected at its opposite end to one of two gates T4 controlling the inlet or supply passage, which gates are suspended from studs 75, each said gate be ing formed integral with one of two toothed segments 76 which are pivoted on said respcctive studs and the teeth of which intermesh so that the gates move in opposite directions simultaneously.

It is apparent from the structure described, particularly the short, sharp nose 77 of the cam 62, that the application of opening tension to the rod 68 is momentary, the tension being immediately released so that the weight 71 tends to close the gates through the. lever connection shown. The gates are, however, held in open position by the trigger action illustrated in Figure 12. To this end either the right or left hand gate is provided with a lug 80 which enters the notch 81 in a freely swinging depending trigger member 82, which hangs from any suitable stationary support on the frame, the trigger serves to hold the gates open until the desired charge is delivered to the hopper and is tripped by the weighing apparatus when the delivery of this charge to the hopper is completed. Tripping is accomplished by tripping lever 83 pivoted at 84 which in this instance is the pivot from which the trigger swings and said lever83 has a finger 85 to engage the trigger from the side on which it is engaged by the lug 80 on the gate. The tripping lever 83 extends backward from the pivot 84 on the side thereof opposite from the arm 85 and is pivotally connected at its end to a connecting rod 86 which as shown is adjustable by means of a turn buckle 87 and which is pivotally connected at 87, its lower end, to the scale beam 90 which controls the hopper as hereinafter described.

It is apparent from the illustration that when the long arm 91 of the scale beam to which the connecting rod 86 is pivoted at its lower end, rises as it will when the full load is introduced into the hopper. the triggcr 82 will be tripped releasing the gates and permitting them to close.

The weighing hopper consists of a pair of rotary paddle wheels suspended from the short arm 92 of the scale beam 91, as by bracket 100. These paddle wheels 9495 are provided each with. three vanes 01'. paddles 96. separated by arcs of 120 and radiating from the respective centers of the said wheels. It may be noted that each wheel consists of two discs 98 spaced apart and concentric with the respective shafts 99 which shafts are mounted in the bracket 100 which as aforesaid is suspended from the scale beam by means of a knife edge 101. The paddles 96 connect the discs which are spaced apart slightly from a position of contact or tangency, the paddles extending slightly beyond the discs so that they overlap at 102 as shown in Figure 3.

The shafts 99 are connected so that they rotate simultaneously and oppositely by means of toothed gears 104 and 105 secured to the respective shafts 99 and intermesh- The hopper receptacle is formed by the respective blades or paddles 98' of the two paddle wheels, two correspondingblades in contact in the horizontal plane connecting the centers of the shafts 99 and overlapping at 102 as illustrated in Figure 3 forming the bottom, while two others, one on each wheel, extend upward from the horizontal plane at an angle of forming the ends of the receptacles, the other two sides being formed by the sides of the hopper casing 106 to be described, the discs 98 being placed close up against the sides of the casing and the gears 10-l-l05 being outside the casing, see particularly Figure 1.

The respective gears 1047-105, the shafts 99 and the paddle wheels forming the hopper are locked in the closed position illustrated in Figure 3 and described during each weighing operation by means of lugs 108, three on each gear spaced about the center and separated by arcs at 120 and correspondingly each to a closed position of the hopper. These lugs 108 cooperate with stationary lugs 109 on .the frame engaging them in the weighing or upper position of the ho per as illustrated in Figure 2, keeping the iiopper closed during filling. When the charge is completed and the hopper drops due to the swinging of the scale beam, the lugs 108 pass out of alignment with the lugs 109 on the frame permitting the paddles to rotate opening and dumping the hopper.

In the operation of the hopper as illustrated, the paddles rotate oppositely but each rotates in but a single direction on the bearing through an arc of 120 at each dumping operation and as each paddle wheel comes around to closed position the scale beam having risen as soon as the material r was dumped, the next lug 108 on each wheel encounters the corresponding lug 109 on the frame and before reaching this position each lug 108 passes a corresponding pivoted spring catch 110 which swings out of the way and then returns to position behind the lug 108 being actuated to this end by coil spring 111 or any other suitable means.

The apparatus illustrated is primarily intended tor mixinoliquid and solid, particularly for mixing lime and water. The water supply is provided by pipes 112 and 114 having valves controlled by levers 115 and 116, the opening and closing of the valves is effected by and from the weighing mechanism and this closing may be arranged as illustrated. In the illustration one of the hopper paddle shafts 99 is provided with a sprocket. 118 driving a chain 119 which meshes with a sprocket 120 mounted on a bracket 113 on the frame at the side, which sprooht actuates crank pin 121 and connecting rod 122 which latter in turn actuates crank in 121 and connecting rod 122 which latter 1n turn actuates sliding rod 123 to which the valve levers 115-116 are connected in any suitable manner as by passing through slots 124 therein.

It is apparent that the supply of ii. Hid may thus be o controlled that it will ow into the mixing drum during and only during the mixing operation which occupies the period between the respective dumping operations of the hopper.

It will be noted that the casing 106 completely encloses the hopper and that it includes a funnel 126 with an outlet ponin 127 over the center of the mixing drum a d that it also includes an inlet assage 1 8 leading downward from the gates 7 4:.

The mixer or mixer drum 2 rotates continuously and receives and mixes material delivered to it, the period of mixing being varied h re ulation of the mechanism as describe ll ixing is efi'ected by the rotation of the mixer combined with the action of the stationary lows 5. The mixing drum is supported or rotation on bearing 180, see FlgllIB 7, said bearing consisting of a supporting ring 181 mounted on the frame and of slightly greater diameter than the discharge opening, said ring has a poripheral shoulder 182 grooved to form a track for the bearing rollers 183, which also engage a bearing ring 184 secured to the bottom of the drum around the discharge opening 185, said bearing rin presents a peripheral downwardly dispose lateral sur face 186 for en agement with the rollers 183 and an inwar ly disposed cylindrical surface 187 to en age an outwardly disposed cylindrical sur ace 188 on the supporting ring, said surfaces are in efi'ect guide sub faces and are suitably lubricating as by grease cup 189. Apertures 190 in the ring are merely for economy of material and reduction of weight.

Dumping or discharging of the mixer at the end of the mixing operation is efiected by raising the mixing valve 130 and directing the material to the central valve 0 ening 131 by means of discharge guide 13;.

The valve 130 is raised and the guide is swung to discharge position in which it directs the material toward the center openin at the desired intervals by the rotation o the discharge cam 134 which is normally stationary, being loosely mounted on the cam shaft 39. This cam rotates at intervals corresponding to the mixing and discharge periods of the mixing drum. Cam 134 actuates a follower 135 carried at the swinging end of an arm 136 of a bell crank lever 137, the swinging end of which is Pivotally connected at 138 to the short connecting rod 139 which is pivoted at its opposite end 140 to a sliding rod 141 which is connected at its opposite end by means of a short connecting rod 142 to the lower end of the depending arm of a bell crank lever 143 which has a longitudinal arm 144 to the swinging end of which a sliding rod 145 is connected by a short connecting rod 146. The sliding rod is mounted in bearing 140 in the frame and carries a valve carriage 147 which engages and lifts the valve 130 at intervals corresponding to the rotation of the cam.

The guide 132 which is pivoted at 149 to a bracket 150 on the plow frame 151, is actuated by an arm 148 thereon. This arm 148 which is rigid with the guide 132 is connected by a thrust rod 152 to the swinging end of an arm 153 of bell crank lever 154 pivoted at 155 on the frame, the other arm of said lever being slotted at its swinging end at 156 to receive a pin 157 carried by the sliding rod 141 which actuates the valve 130 so that the valve 130 is opened and the guide 132 is swung into operative position simultaneously, said position being shown in dotted lines in Figure 9.

The discharge cam 134 which has already been described as loose on the cam shaft 39 is actuated at intervals by a train of gearing controlled by the dumping shaft 45 which is actuated by do 41 and returned to normal position by sprlng 13, This train of gearing consists of a toothed gear 160 secured to the cam shaft 39 and meshing with a toothed gear 161 which is loose on the jack shaft 162. The jack shaft carries at its upper end secured thereto a toothed gear 163 which meshes with a toothed gear 164 secured to the cam 134. The gear 161 which as aforesaid is loose on the jack shaft 162 is connected to the jack shaft at intervals by clutch mechanism consisting of a cam clutch member 166 keyed to the jack shaft 162 to slide relatively thereto. The cam clutch member 166 has a path 167, including a sharp nose or raised portion 168 and this path is engaged by a follower 169 carried by an arm 170 of the dumping shaft 145.

When the dumping tripper shaft 45 is oscillated by the action of the dog 41, see Figure 4, the follower 169 which normally occupies the cam path 167 of the cam 166 is removed from said path, the cam is released so that it is free to slide on the jack shaft and moves upward in response to the thrust of the coil spring 172, bringing the clutch teeth 173 on the cam into mesh with the clutch teeth 174 on the gear 161, which it will be noted is rotating continuously driven by the gear 160 on the cam shaft. The engagement of the clutch rotates the jack shaft which operates the car 164 through the gear 163 on the jack s aft and in turn rotates the cam 164 with the result already described.

The rotation of the drum which is continuous throughout the operation of the machine as aforesaid produces mixing in cooperation will] plows 5 which are mounted on dcpcnding-1ods 175 extending downward from the plow frame 151, see Figures 1 and 9.

An important feature of the machine is its completely automatic action which continues so long as material is supplied. The machine without supervision weighs, fills, mixes and discharges at the desired predetermined intervals.

I have thus described specifically and in detail a machine embodying my invention in the preferred form in order that the nature and operation of the same may be clearly understood. These specific terms herein are, however, used descriptively rather than in a limiting sense, the scope of the invention being defined in the claims.

What I claim and desire to secure by Letters Patent is:

1. In a mixing machine, a rotating mixer, timing mechanism operated at a speed proportionate to the speed of the mixer, weighing mechanism, means for leading a supply of material to the weighing mechanism, a gate for controlling said supply, means controlled by the timing mechanism for opening the gate, means causing the gate to close when a predetermined charge has been delivered to the weighing mechanism, means for automatically releasing the charge when weighed, whereby the charge is delivered to the mixer, a discharge valve controlling the delivery of material from the mixer and means controlled by the timing mechanism for opening the discharge valve.

2. In a mixing machine, a rotating mixer, timing mechanism operated at a speed proportionate to the'speed of the mixer, weighing mechanism, means for leading a supply of material to the weighing mechanism, a gate for controlling said supply, means controlled by the timing mechanism for opening the gate, means operated by the weighing mechanism causing the gate to close when a predetermined charge has been delivered to the weighing mechanism, means for automaticallyreleasing the charge when weighed, whereby the'charge is delivered to the mixer, a discharge valve controlling the delivery of material from the mixer and means controlled by the timing mechanism for opening the discharge valve.

3. In 'a mixing machine, a rotating mixer,

timing mechanism operated at a speed proportionate to the speed of the mixer, weighing mechanism, means for leading a supply of material to the weighing mechanism, agate for controlling said supply, means controlled by the timing mechanism for opening the gate, means operated by the weighing mechanism causing the gate to close when a predetermined charge has been,

reeeptaic e; means, for

delivered to the weighing mechanism" means pirowiding or the automatic release o the char e when weighed, whereby the charge is d e ivered to the mixer, a discharge valve controlling the delivery of material from the mixer and means controlled by the timing. mechanism for opening the discharge valve, means for leedin liquid to the mixer and means for control ing said supply of liquid.

4. in a mixing machine, a rotating mixer,

timing meehanism operate at a speed {eroportionete to. the speed of the mixer, Weighi-ng meehanisne, means for leading a supply of msteriel, to the Wei .hing mechanism, a gate; for control-ling sei sup ly, means controtl I by the timing mechanism for opening; the gate, metuis causing the gate to close when a predetermined charge lfiilts been delivered to the Weighing mechanism, means providing for the automatic release of the change when eighed, whereby t 6 charge is delivered to. the mixer,la discharge valve controlling the delivery of material roin t'e mixer and means controlled by" the timing meehanism tor opening the discharge vs ve, means 01: lee-ding liqui to the III'IXQI and means eetuated h t e weighing mechanism for controlling the supply 0 liquid.

5. In a miiiing machine, a mixing 'c'onminer and mixing, means, teeding end weighin mechanism compliising a weighing lean ng material to the reoeptaele a gate controlling sai means, means tor opening, and ctosin the, bottom of said receptacle, meens to; 'ckingfsziid letter means in elosed position, yiel means supporting the receptacle adjusted to yield on the placing of e fedetermine'd load in, the receptacle to Weig' said oad, e, part oi said locking means being supported sepai' stely from the receptacle in cooperation therewith at, the empty er upper position of the reoejgtacldenoth'er art. of said lock moving wi the receptacle so, that theieekin and the olosing'mans for the receptee'le ere Released as the Receptacle drops, when Weig' 1- m is completed. releesmgg e, weighe material,,me3ns er supplying liqjiid and means @Qnmetedlwit 12 'e reeepteele closing", device ion controlling said liquid; suppl 6. In a mixing niiichiiie rotary mixin 1 m, weighing rhec eni sm ingering to the mixing ineaiis, means for sugglfiin ma terial thereto, means. or opening a'n" c osing sii" y, and timing control l-Higsai lattermeansf V 7. In a: milking machine rotsizy mixin means, weighing mechanism: dhj 'ering to mixing means, means tor. sujgjil'y rigg inaterialthereto, means, or beating a" lc'ldsing the en .1 and timing mechani fii oiitfolling sai .iatter meens,.ain means. dryer ing the relation of'the i'rit h pt tinting mechanism to the motion of the ifiiief.

means for eonweighthe mixing niean's agitating the material to ac- 8. in a mixing machine, mining the material during mixing, ing mechanism delivering to means cUm'plisli mixing and means for actuating said agitating means, timing mechanism fic ttiated to more in proportion to the agitatiiig' mechanism, means for leading material to the wei hing mechanism, means for controlling said suppty and connections to the timing mechanism for timing said control, a Vztlve for dischar ing the; mixed material, means for openin the Vtilife and eonneetiens t6 the timing mechanism for timing the (a e (iizttiflh Of said VSJlVB.

Ii a mixing machine, means for containing the material during mixing, means for agitating the material to accomplish mixing and means for actuating said agititting" means, timing mechanism aetnited to mate in ptoportionto the miier; agitat ing mechanism, means for leading inaterial to the mixing container, means for controlling said supply and connections to the timing mechttnisln for tin'iing said eo'iitrolj verve for discharging the mixed material means for opening the valve and conmotions to the timing mechanism 0r timing the epe'r'atien of sang valve, weighing mechanism renewing an weighing the material from the co trailed suppty means connected to the Wei-g iii-g mechanism controlling" the closing of eaie'euppiy aiss'svg e.

10?. In a mixing me he, means fer' eontei'fiing' the Ihitefial dnting mixing, means fer agitating the material to aeeeinplish inix'ingand means for a'ctiittting se-it tigi th ti'ng means, timin mechanism actuated to move in pro-poison to the mixer,- egitetin ine'c'httnistfl, means for leading meteflel to the rnixin container, means be controllin said sn p and Connections" to the tiin-iflg mec'han em for timing said Central,- a valve fer dischar ing the mix d materiel; means for ope ing the verve andeonneetie'ns tn the magnetism gr timing the operation of said valve, weighing mechanism i'ciV- ing" and weighing the material from the con ticrlld s'npfil metiiis eenneeted to the weighin flied ar'iism continuing the eiassin of said assage, said Weighing niltanis'ni comp-rising means for d-ishafg'i fig the Weifhed material into the mixing container at t'e end o'fthe Weighing epemnte.

11.7 In a mixing machine, nieins fee containiti' the material during miiing means at tg eating the material m ficcor'nplisjh hie ing midmeans for actuating saidegnatin htfins', timing mechanism actuated as move in fifdpdrti'oii to the iniiier, fi'gitiztiiig mediar'rism, in'ea'fi's for leadiiigjntt-tetiali to the int 'rflg' eenteiner, means for eontrolhng eid riply and connections w. the tiifiing' ffiedh nismt for timing said cont-rol, 2t valve flifr' discharging the filiked materiei, mm: for

opening the valve and connections to the timing mechanism for timing the operation of said valve, Weighing mechanism receiving and Weighing the material from the con trolled supply, means connected to the weighing mechanism controlling the closing of said supply passage, said Weighing mechanism comprising means for discharging the Weighed material into the mixing container at the end of the Weighing operation, means for supplying liquid to the mixing container and means controlled by the Weighing mechanism discharge for controlling said liquid supply.

12. In a mixing machine, rotary mixing means, a weighing hopper consisting of a plurality of members having spaced axes about which they swing, weighing means supporting said members, means for locking them in co-operating position in which they form a receptacle to hold the material to be weighed, said locking means being placed to engage the swinging members in empty position oi the weighing device, so that said members are released from the locking means by passing out of engagement therewith, as the weighing operation is completed by filling the hopper to the predetermined extent, the swinging members being swung by the weight of the material when thus re leased to drop the material weighed, said Weighing mechanism delivering to the mixing means, means for supplying material to said Weighing mechanism, means for opening and closing said supply, and timing mechanism controlling said latter means.

Signed by me at Baltimore, Maryland, this 22nd day of January, 1923.

LEVIGN E M. ZEPP. Witnesses PORTER H. FLAUTT, CARRIE M. REELY. 

